Interessante uitvindingen in het wasproces
Dolfi is described as a hand-sized device that cleans your clothing with the power of ultrasonic technology. It is considered the “next generation cleaning technology,” and it’s gentle on clothing. The device is great for different types of clothing such as delicate fabric (silk, lace and cashmere); men’s shirts and ties; knit and wool; sportswear; swimwear; all baby and kids stuff.
Features of Dolfi include:
- Perfect Portable: Easy fit for any bathroom, luggage, of even pocket.
- No Effort Operation: Just switch the Dolfi device on.
- Save Time & Money: Forget about hassle of washing while traveling.
The device’s team stated, “Pack smart for your great adventures: inflatable hanger, clever fixture, sink stopper and of course the Dolfi device. The set is perfectly portable to fit in any luggage and it will make your travel more fun without the hassle of laundry. Dolfi is great for everything that you would normally hesitate to throw into a washing machine! With Dolfi, ‘Handwash Only’ labels no longer apply.
“Dolfi isn’t just a pretty package – this compact but powerful device consumes about 80 times less energy than a conventional washing machine, helping you make a huge positive impact for the planet and, of course, for your wallet.”
Also sharing how easy-to-use Dolfi is, the team noted, “The device will glow blue while it softly cleans your clothes. Blue light indicates ultrasound vibrations in the water. It works like magic! After only 30-40 min, your clothes will be fresh and clean. Rinse them and hang to dry – next morning you can wear your favorites again!”
Since its debut on Tuesday (January 20th), Dolfi’s campaign has surpassed its initial goal and has raised nearly $128,000 from over 1,100 backers. It is set to close on February 19th and backers will expect to receive the finished product later this year.
MIT's pedal-powered washing machine, the product of four years of research, is made up of a bicycle frame, a bicycle chain and oil drums—all items that are inexpensive and easy to find.
A prototype of the washing machine was built in 2005 by Radu Raduta, a mechanical engineering graduate student at MIT. After winning first prize for her design in the MIT IDEAS competition, Raduta received funding to continue work on the machine.
Raduta and her team joined with MayaPedal, a non-governmental organization in Guatemala, to help develop the washing machine. The team discovered that pedal-powered devices are old hat for many Guatemalan villagers. A particularly bicycle-savvy Guatemalan named Don Luis told the MIT students that his "entire family uses several bicimáquinas, such as the bicimolino (the pedal-powered mill) and thebicidesgranadora (the pedal-powered kernal remover). "
Construction of the pedal-powered washing machine is relatively easy. An oil drum is cut into sections and welded together into a small barrel. A smaller inner drum is rotated during wash and spin cycles, and the whole thing is powered by a wheel-less bicycle frame.
MIT's machine, dubbed bicilavadora—a combination of the Spanish words for bicycle and washing machine—had a test run last month in Ventanilla, Peru. The test was successful with the exception of minor water leakage around the drum's edge.
While washing clothes in a pedal-powered machine may be more effective than hand-washing, pedal power is almost certainly more energy intensive. But who knows—maybe a cottage industry of washing machine bikers will pop up to make things easier.
MIT is one of the strongest centers for this kind of design tailored to the needs of developing countries, dubbed "appropriate technology" or "leapfrog design." You can watch MIT's Amy Smith, a genius grant recipient, talk about the principles behind this kind of design here here.
by Sam Savage
FEBRUARY 18, 2009